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CheckBox Control Type

This topic provides information about Microsoft UI Automation support for the CheckBox control type.

A check box is an object used to indicate a state that users can interact with to cycle through that state. Check boxes either present a binary (Yes/No), (On/Off), or tertiary (On, Off, Indeterminate) option to the user.

The following sections define the required UI Automation tree structure, properties, control patterns, and events for the CheckBox control type. The UI Automation requirements apply to all check box controls where the UI framework/platform integrates UI Automation support for control types and control patterns.

Typical Tree Structure

The following table depicts a typical control and content view of the UI Automation tree that pertains to check box controls and describes what can be contained in each view. For more information about the UI Automation tree, see UI Automation Tree Overview.

DefaultAction

The default action of the check box is to cause a radio button to become focused and toggle its current state. As mentioned previously, check boxes either present a binary (Yes/No or On/Off) decision to the user or a tertiary (On, Off, Indeterminate). If the check box is binary the default action causes the "on" state to become "off" or the "off" state to become "on". In a tertiary check box the default action cycles through the states of the check box in the same order as if the user had sent successive mouse clicks to the control.